The world-religions -- Heraclitus and Socrates -- The Academy and the Porch -- The preaching of Stoicism -- The Stoic sect in Rome -- Of reason and speech -- The foundations of physics -- The universe -- The supreme problems -- Religion -- The kingdom of the soul -- The law for humanity -- Daily duties -- Sin and weakness -- Counsels of perfection -- Stoicism in Roman history and literature -- The Stoic strain in Christianity -- Bibliography.